RS-232 Line Monitor???

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Article #7083

#7083

From: Granville Barker
Date: Wed, 02 Sep 1992 23:39

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I am trying to build a RS-232 line monitor.  

I want to connect it between two RS-232 devices, and have a wire comming 
off that I can connect to another computer and monitor both sides of the
conversation between the other two devices.  Ie.. a Plotter and a Computer.

I need to see what is being transmited and received, I tried hooking 
 pins 2 and 3 to diodes, then connecting rx on the monitor computer to
 the other end of the diodes.  THe other 2 devices still communicate ok, but
 I never see anything on my monitor computer.  I am connecting ground.

 Any ideas??


Thanks,

Granville Barker
geb1@isis.msstate.edu

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Newsgroups: sci.electronics
Path: arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!asuvax!ukma!nntp.msstate.edu!Isis.MsState.Edu!geb1
From: geb1@ra.msstate.edu (Granville Barker)
Subject: RS-232 Line Monitor???
Message-ID: <geb1.715477196@Isis.MsState.Edu>
Organization: Mississippi State University
Date: Wed, 2 Sep 1992 23:39:56 GMT
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